Slur cock



Dec. 24, 19.35. o, SCHLETTER 2,025,130

SLUR COCK Filed Dec. 2s, 1934 2 sheds-sheet 1 1NVENT0R, 05cm' 56k/eifel' ATTORNEY.

Dec. 24, 1935. o. scHLETTER SLUR COCK Filed Dec. 28, 1934 2 Sheets-Sheet 2 Qii@ INVENTOR. 0.5602' Salz/eifel' ATTORNEY.

,Patented Dee., 24, 1935 UNITED STATES APATENT OFFICE SLUB COCK Olcar schietta', North Wales, Pa.

Application December 28, 1934, Serial No.| '159,518 12 Claims. (Cl. 66-110) The present invention relates to slur cocks used in full fashioned or flat knitting machines to forwardly move the jacks in order to expel the sinkers for the formation of the loops in the knitted fabric.

In the usual construction, the slur cock, although mounted for slidable adjustment in relation to its housing and to the jacks, becomes rigidly fixed once adjusted in position. This usual construction results in numerous disadvantages, the most salient being that the slur cock must be regulated with the greatest of care and to a degree of minute flneness for, if not adjusted in the required correct position, it will either act inadequately upon the jacks and fail to properly expel the sinkers, or it will exert too great a force upon the jacks and sinkers with the liability of causing distortion and breakage thereof.

It is therefore one of the main objects of the invention to provide a construction enabling the slur cock to be self-adjustable, thus dispensing with the necessity of accurate adjustment while assuring a constant proper action upon the jacks and practically eliminating the chief causes of damage to the jacks and sinkers.

Another important object of the invention resides in the provision of means whereby the slur cock may yield under the least resistance in order to prevent detrimental effects on parts of the knitting machine, particularly` the jacks and sinkers, should they accidentally be interfered with in their normal operation.

Other important objects and advantages of the invention will be in part obvious and in part pointed out hereinafter.

In order that the invention and its mode of operation may be readily understood by those persons skilled in the art, I have in the accompanying drawings and in the detailed description based thereupon set out possible embodiments of the same.

In these drawings:-

Figure 1 is a top plan of the preferred embodiment of the invention.

Figure 2 is a transverse cross section taken on line 2-2 of Figure 1.

Figure 3 is a plan of the slur cock box or housing showing the adjustable means provided there- Figure 4 is a perspective of the slur cock and slide block.

Figure 5 is a top plan of a modified embodiment of the invention.

Figure 6 is a transverse section taken on line 5,-6 of Figure 5.

Figure 7 is a bottom plan of the slur cock and its slide illustrating the mode of yleldably mounting the same.

Figure 8 is a perspective of the slur cock adjustable means.

With more particular reference to the drawings wherein like characters of reference will designate corresponding parts throughout, my 10 improved device may be stated to comprise a slur cock housing or box I preferably having a recl tangular conguration and provided with an elongated slot 2 disposed substantially midway the length of said housing or box adjacent one of the marginal edges thereof and preferably provided with a pair of openings 3 positioned one on each side of said slot andadapted to receive suitable securing elements for attachment to the usual slur cock motion transmitting bar (not shown). Upon one face of the slur cock box I are formed anges 4 devised to straddle said motion transmitting bar, whereas upon the opposite face a pair of diametrically opposed ribs 5 is provided to define an enclosure 'centrally of the 25 body of said box. A channel 1 is cut into the surface of-the box and disposed to extend from the slot 2 to the opposite edge of the box in between the ribs 5 thereof.

Adapted to be received for slidable adjusting 3o movement within the channel I is a regulator 8 terminating at one end with an angularly bent rim 8 and at the other end with a lug I0 in fixed engagement with a screw threaded stem II arranged to project transversely over the slot 2. A knurl nut I2 is received in said slot 2 and has threaded engagement with the screw threaded stem II whereby, upon turning of said nut I2, the regulator 8 will be caused to slide for adjusting the same in relation to the box I. The 40 nut I2 is locked against free rotation'by means of a bowed leaf spring I3 affixed to the box I, for instance, by means of a suitable fastening element I4, and so disposed that the free end thereof bears against the marginal edge of the knurl nut I2 as indicated at I5. The bowed leaf spring I3, it will be understood, due to its cooperation with the nut I2, also acts to maintain the regulator 8 in its adjusted position.

Freely received upon the box I and adapted for position between the ribs 5 within the enclosure 6 and over the regulator 8, is a substantially rectangular block I6 commonly referred to in the art as a cock box slide. The length of the block or slide It is such that the outer extremity 56 I1 thereof normally projects beyond the adjacent edge of the box I in the manner represented in the drawings. The projected outer extremity of the slide block I8 is provided withl a groove I8 adapted for free engagement with the bent rim 9 of the regulator 8 whereby said block may move in andout of the cock box I and with respect to said regulator 8.

Rigidly secured to the protruding end I1 of the slide I8 by means of bolts I9, or like fastening elements, is a slur cock 28 having the usual diamond shape configuration and formed with active cam edges 2| adapted to act upon the sinker jacks of the knitting machine in the manner well known in the art.

At the inner marginal edge of the slide block I8 is cut a recess 22 registering with the lug I8 of the regulator 8 in order to accommodate the same when said slide block I8 is moved inwardly of the box I in sliding relation to said regulator 8.

Disposed to project from the exposed face of the block I6 and iixedly positioned thereon adjacent the recess 22 is a pair of pins 23, each engaging one end of a coil spring 24 having its opposite end secured to a suitable portion I4ofthe A cock box I, for example, by means of a screw threaded element, as shown at 25, so that said slide block I6 is normally urged outwardly of the box I, the slide block I8 being limited in its outward movement by the rim 9 of the regulator 8 coming in contact with the shoulder 28 provided by the formation of the groove I8 in the slide block I6.

In order 'that the slide block I9 may move easily and freely, the box I is made with diametrically opposed bearing faces 21 slightly raised from the surface of said box and arranged within the enclosure 6 to contact with the adjacent portions of the underside of said slide block I6.

The slide block I6 is maintained in position within the enclosure 6 on the box I by means of a cover 28 resting upon the ribs 5 of said box I and1 attached thereto by means of screws 29 or the "like, A portion of the cover is cut away as shown at 30 to provide for the free adjustment of the regulator 8 and its lug I0, said cover also having elongated slits 3I formed to accommodate the pins 23 projecting from the slide block I6 and to permit unobstructed slidable movement thereof.

In Figures 5, 6, and 7, I have shown a modification in the mounting of the cock box slide. In this modiiication, the cock box I, adjusting strip 8, and parts associated therewith, are of the same construction hereinbefore described, as will clearly appear upon reference to the drawings.

The cock box slide I6' adapted to be positioned within the enclosure 6 between the ridges 5 on the cock box, and to engage the rim 9 of the strip 8 within the groove I8, is provided with a pair of paralleling bores 32, each disposed adjacent the opposite longitudinal marginal edges of said slide.

'I'he cover 28 arranged over the enclosure 6 on the box I and secured thereto by means of bolts 29 retaining the cock box slide I6 in position is formed at one of its marginal portions with a pair of depending studs 33, to each of which is attached a pin 34 supported in paralleling relation to the under face of said cover and disposed to register with the bores 32 in the slide I6' to be freely introduced therein. A coil spring 35 encircling each of the pins 34 rests with one end against the adjacent surface of the stud 33 and with its other end against the adjacent surface of the slide I6. In this manner, it will be understood that the slide I 8 is yieldably urged outwardly of the box I. It is to be noted that the length of the pins 34 is such 'that their extremities will not reach the bottom of the bores 32` but that an appreciable free space is left when the parts are in 5 .normal position so that the slide I8" may be free to move inwardly of the box I.

In use, my improved slur cock is mounted upon the knitting machine to move back and forth from one end of the knitting section to the other and 10 is disposed to come in contact with the jacks in order to successively expel the same from their bed to advance the sinkers for the formation of the loops inthe knitted fabric, as is commonly known in the art. Because of the yieldable 15 mounting of the slur cock 20, it will be appreciated that the same need not be accurately adjusted with respect to its housing I and in relation to the` jacks, but it will be sufllcient to set said slur cock roughly whereupon the spring connection between 20 the cock slide I8 and the housing I will allow the slur cock 20 to assume the correct position for properly acting upon the jacks to operate the same.

-The slur cock is roughly adjusted by means of g5 A"the knurl nut I2 which acts upon the cock slide regulator 8 to adjustably displace the same within the channel 1 of the cock box I and, accordingly, regulates the distance at which the slur cock is to normally extend from its supporting housing. 30

Upon referring to the drawings, it will clearly appear that the springs 24 in the preferred embodiment of the invention, or the springs 35 in the modified construction, normally urge the slide I8 carrying the slur cock 2li outwardly of 35 the housing I but that said slide is limited in its outward movement by the bent rim 9 of the strip 9 bearing against the shoulder 26 formed by the groove I8 cut in said slide.V The provision of the groove I8, however, permits the slide I6 to freely 40 moveinwardly of the housing I whenever the slur cock 28 meets with resistance.

Dining operation of the knitting machine, it often happens that some foreign element, such as a screw or nut, accidentally falls into the jack 45 bed interfering with the free motion of the jacks, or that the jacks or suikers become inoperative due to jamming or any other unexpected mechanical defects. In such instances, it will be understood that the slur cock constructed in accord- 50 ance with my invention will yield upon reaching the inoperative jack or jacks and slide past the same, thus overcoming any danger of injuring the working parts of the knitting machine.

Manifestly, the constructions shown and de- 55 scribed are capable of several modifications and those modifications which come within the scope of the subjoined claims are to be considered within the spirit of the invention.

What I claim is:- 60

1. A device of the character described comprising a slur cock box provided with pins projecting inwardly of the same, a slur cock carrying member received in said box and having means adapted to slidably engage said pins for longi- 65 tudinal reciprocating movement thereon, and spring means acting upon said member to normally urge the same outwardly of the box.

2. A device of the character described comprising a slur cock box, a pair of pins supported inwardly of said box, a slur cock carrying member received in said box and having a pair of internal longitudinal bores engageable with said pins, and a coil spring about each pin and acting 75 upon said member to normally urge the same outwardly of the box. v

3. A device of the character described comprising a slur cock box, a pair of pins supported inwardly of said box, a slur cock carrying member received in said box and having a pair of internal longitudinal bores engageable with said pins, a coil spring about each pin and acting upon said member to normally urge the same outwardly of the box, and means carried by said box and engaging said member to limit the movement thereof.

4. A device of the character described comprising a slur 'cock box, a. pair of pins supported inwardly of said box, a slur cock carrying member received in said box and having a pair oi' internal longitudinal bores engageable with said pins, a coil spring about each pin and acting upon said member to normally urge the same outwardly of the box, means carried by said box and engaging said member to limit the movement thereof, and means operable to adjust said first mentioned means in relation to the box.

5. A device of the character described comprising a slur cock box, a slur cock carrying member mounted in said box for yieldable movement outwardly of the same, a regulator arrangedin said box to be slidably engaged by said member for limiting the outward movement of the latter, and means associated with said regulator for adjusting the same within the box in relation to said member.

6. A device of the character described comprising a slur cock box, a slur cock carrying member mounted in said box for longitudinal reciprocating in and out movement in relation to the latter, coil springs connected to said boxl and member and normally acting to yieldably urge the latter outwardly of the box, and means carried in saidbox and engaging said member to check the outward movement thereof against the normal action of the springs.

7 A device of the character described comprising a slur cock box, a slur cock carrying member mounted in said box for longitudinal reciprocating in and out movement in relation to the latter, coil springs connected to said box and member and normally acting to yieldably urge the latter outwardly ofthe box, means adjustably arranged in saidbox and engaging said member to check at a predetermined point the outward movement of the latter against the normal action of the springs, and manually operable means associated with said first mentioned means for adjusting the same within the box in relation to the slur cock carrying member.

8. A device of the character described comprising a slur cock box, a slur cock carrying member slidably received in said box for in and out movement with respect to the same, said member having means providing a shoulder thereon, yieldable means between said box and member and acting to normally urge the latter outwardly of the box into operative position, and means arranged in said box and engageable with the shoulder on the slur cock can'ying member for limiting the outward movement of the latter 5 against the normal operation of said yieldable means.

9. A device of the character described comprising a slur cock box, a slur cock carrying member slidably received in said box for in and out movement with respect to the same, said member having means providing a shoulder thereon, yieldable means between said box and member acting to normally urge the latter outwardly of the box into operative position, and means arranged in said box and engageable with the shoulder on said member for adjustably regulating the operative position and checking at a predetermined point the outward movement of the latter against the normal action of said yieldable means.

l0. A device of the character described comprising a slur cock box, a slur cock regulator mounted in said box for slidable movement therein, a slur cock carrying member arranged in said box to slide in and out of the same with respect to said regulator, spring means acting on said slur cock carrying member to normally urge the same outwardly of the box into operative position, and a rim carried by said regulator and engageable with said member to check the outward movement of the latter against the normal action of said spring means.

i1. A device of the character described comprising a slur cock box having a channel cut therein, a slur cgck regulator mounted in said box for slidable movement in the channel thereof, a slur cock carrying member arranged in said box to slide in and out of the same with respect to said regulator, spring means acting on said slur cock carrying member to normally urge the same outwardly of `the box into operative position, and a rim carried by said regulator and engageable with said member to check the outward movement of the latter against the normal action of said spring means.

12. A device of the character described comprising a. slur cock box, a slur cock regulator mounted in said box for slidable movement therein, a slur cock carrying member arranged over the regulator in said box tovslide in and out of the same with respect to the regulator, said member having a relatively wide groove cut therein to provide a shoulder, spring means acting on said slur cock carrying member to normally urge the same outwardly of the box into operative position, 65 and a rimcarried by said regulator and extending in said groove for engagement with the shoulder provided on the slur cock carrying member to check the outward movement of the latter against the normal action of said spring means.

OSCAR SCHLE'I'I'ER. 

